JP2605640Y2 - Hydraulic lifting / lowering operation device for agricultural tractor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for an agricultural tractor connected to a rotary working machine.

[0002]

2. Description of the Related Art Conventionally, a driving handle of an agricultural tractor is provided with a steering handle at a front position, a sub-transmission lever is provided at a left position of a driver's seat, and a hydraulic lifting operation lever is provided at a right position. A main transmission lever is provided. A main clutch pedal is provided on the left side of the driver's feet, and a brake pedal is provided on the right side.

[0003]

However, in the above-mentioned conventional type, when the rotary work is performed by the agricultural tractor, the steering handle is operated by the left and right hands, and at the same time, the main shift is operated by the right hand on the headland. At the same time, it is necessary to operate the hydraulic raising / lowering operating lever to rotate the machine with the rotary working machine raised, and the driving operation is complicated and an accident is likely to occur.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to an agricultural tractor in which a rotary device is connected to a rear portion of a machine body and which can be moved up and down by a hydraulic elevating device. And a switch for switching the operation switch and the on / off operation on the side of the PTO shaft between an interlocked state and a non-interlocked state. It is intended to provide a lifting operation device.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a body of an agricultural tractor, in which an engine 2 is mounted on a front portion of the body 1 and a main clutch device 3 is mounted. Provided. Reference numeral 4 denotes a hood covering an upper portion of the engine 2, and reference numeral 5 denotes a front wheel.

Reference numeral 6 denotes a transmission case provided at a rear portion of the body 1, reference numeral 7 denotes a hydraulic cylinder, reference numeral 8 denotes a hydraulic lifting device for vertically moving the rotary device 8-1, and reference numeral 9 denotes a lift arm. Reference numeral 10 denotes a rear wheel, 11 denotes a driving unit, and a dashboard 12 is equipped with a steering steering handle 13.

Reference numeral 14 denotes a main shift lever provided on the right side of the driver's seat 15, and reference numeral 16 denotes a manual hydraulic lift lever provided at a rear upper position of the main shift lever 14.

Reference numeral 17 denotes an operation switch provided on the foot portion 18 of the driver.
, And the on / off operation of the PTO shaft 19 can be performed simultaneously. Reference numeral 20 denotes a changeover switch for switching the operation switch 17 and the on / off operation of the PTO shaft 19 between an interlocked state and a non-interlocked state.

Reference numeral 21 denotes a clutch pedal provided on a step 22 on the driver's left foot, and reference numeral 23 denotes a brake pedal provided on a step 24 on the driver's right foot.
23-1 and right brake pedal 23-2.

The present invention is configured as described above,
Therefore, when the rotary work is performed by the agricultural tractor, crushing is performed while the rotary device 8-1 is in contact with the ground in the straight section in the field.

Then, when the body reaches the headland, the driver operates the operation switch 17 at the tip of the foot, whereby the hydraulic lifting device 8 is operated, and the lift arm 9 rotates upward. As a result, the rotary device 8-1 rises, and at the same time, the PTO shaft 19 stops.

Then, by operating the steering wheel 13 for operation, the body is turned and the operation switch 17 is operated when the vehicle is in a straight running state. As a result, the hydraulic lifting device 8 operates to lower the lift arm 9, and at the same time, the PTO
The shaft 19 is turned.

Therefore, the aircraft can go straight while tilling the field scene by the rotary device 8-1.

To stop the link between the operation switch 17 and the PTO shaft 19, the changeover switch 20 is turned off.

As described above, according to the above embodiment, the up / down operation of the hydraulic lifting / lowering device 8 of the agricultural tractor and the on / off operation of the PTO shaft 19 can be simultaneously performed by the operation switch 17.
In addition, since the operation switch 17 is provided at the foot 18 of the driver, the driver can turn his or her left and right hands only to the steering wheel operation when turning the aircraft, so that the driving operation of the aircraft can be performed. Can be performed accurately in a stable state. Further, since the operation is simple, no erroneous operation is performed unexpectedly, and the tractor operation can be efficiently performed as a whole.

To stop the interlocking of the operation switch 17 and the on / off operation of the PTO shaft 19, the changeover switch 20 is turned off.

FIG. 4 shows another embodiment of the present invention, which is an improvement of a hand-side accelerator lever for adjusting the rotation of the engine.

In the figure, reference numeral 40 denotes a hand-side accelerator lever, which connects a vertical accelerator rod 41 in a dashboard. Reference numeral 42 denotes a stopper fixed to the lower side of the accelerator lever 40. The stopper 42 is configured to abut a disk-shaped eccentric cam 43 provided on the upper surface of the operation panel. The maximum rotation of the engine can be regulated by rotating the eccentric cam 43 to change the position.

As a regulating method, a regulating arm 44 may be fixed to an intermediate portion of the accelerator rod 41, and the tip of the adjusting screw 45 may be abutted.

Further, the lower end of the accelerator rod 41 is connected to the foot accelerator, and the lateral pin 46 may be fixed to the accelerator rod 41 at a position near the foot step and regulated by the adjusting screw 47.

[0021]

According to the present invention, the vertical operation of the hydraulic elevating device of the agricultural tractor and the on / off operation of the PTO shaft can be simultaneously performed by the operation switch. Moreover, since the operation switch 17 is provided at the foot of the driver,
When turning the aircraft, the left and right hands can be directed only to the steering wheel operation, and the operation of the aircraft can be accurately performed in a stable state. Furthermore, since the operation is simple, no erroneous operation is performed unexpectedly, and the tractor operation can be efficiently performed as a whole. When stopping the interlocking between the operation switch and the on / off operation of the PTO shaft, the changeover switch is turned off.

[Brief description of the drawings]

FIG. 1 is an overall side view of an agricultural tractor.

FIG. 2 is a side view of a main part of the present invention.

FIG. 3 is a perspective view of the same.

FIG. 4 is a perspective view showing another embodiment.

[Explanation of Signs] 3 Hydraulic lifting device 8-1 Rotary device 17 Operation switch 18 Foot unit 19 PTO shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. An agricultural tractor having a rotary unit (8-1) connected to the rear of the body and capable of moving up and down by a hydraulic lifting unit (8).
On Off operations simultaneously performed operation switch (17) the driver's foot area (19) provided in the (18) Rutotomoni, the same operation switch (17) P
The ON / OFF operation on the TO axis (19) side is linked and unlinked.
A hydraulic levitation operating device for an agricultural tractor, characterized in that a changeover switch (20) for changing over between the two is provided .